Bake-oven.



J. FAULDS.

BAKE OVEN. APPLIGATIO FILED JUNE 10, 1909. y 1,018, 178. h Patented Feb. 2o, 1912.

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BAKE OVEN.

APPLICATION FILED JUNE 10, 1909.

' O18 1 8. Patented.Feb.2o,1912. I

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BAKE OVEN.

APPLIoATIoN FILED 111111110, 1909.

Patented Feb. 20, 1912.

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J. FAULDS.

BAKE OVEN.

APPLIoMfIoN FILED JUNE 1o, 1909.

Patented Feb. 20, 1912.

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BAKE OVEN.

APPLmATIoN HLnn JUNE 1o, 1909.

1,018,178. Patented Feb. 2o, 1912.

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APPLICATION FILED JUNE 10, 1909.

Patented Feb. 20, 1912.

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IMTEB STATES PATENT OFFICE.

JOHN FAULDS, OF OAK PARK, ILLINOIS, ASSIGNOR F ONE-'HALF TO JOHN I. i

MARSHALL, OF CHICAGO, ILLINOIS.

BAKE-OVEN.

Specification of Letters Patent.

`Application led June 10, 1909. Serial No. 501,268.

To all whom "it may concern:

Be it known that I, JOHN FAULDS, a subject of the Kingdom of Great Britain, and resident of Oak Park, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Bake-Ovens, of which the following is al specification and which are illustrated in the accompanying drawings, forming a part thereof. l

The invention relates to bakers ovens, and more particularly to those of the type termed portable ovens wherein the walls of sides 15, 16, may each 'also take the form of the oven structure are constructed in detachable sections adapted to be fitted together at the place of use.

A detail of the invention provides, also, for constructing the oven in sizes of differing capacity through the use of sections providing additional baking compartments which may or may not be incorporated in the oven structurevas desired.

The object of the invention is to provide a bakers oven of improved construction; and the invention is exemplified in the apparatus to be hereinafter described and illustrated in the accompanying drawings, in which- Figure 1 shows in front elevation a bakers oven embodying the features of the invention; Fig. 2 is a central vertical longitudinal sectional view of the same 5 Fig. 3 is a vertical cross-sectional view of the oven taken on the line 3--3 of Fig. 2; Fig. 4 is a plan sectional view taken on the broken line 4 4 of Fig. 3; Fig. 5 is similar to Fig. 3 but shows anoven of smaller size constructed by omitting certain parts included in the arrangement illustrated in Figs. 1 to 4 inclusive; and Fig. 6 is a sectional plan view taken on line6-6 of Fig. 3. p

Theoven provided by the invention preferably assumes the form of a rectangular chambered casing, generally designated by the numeral 10 inthe accompanying drawings. In order that this structure may be p portable the walls of the casing are preferably inade sectional, the4 yfloor and cover members, designated 11 and 12, respectively, being, as shown, each constructed in the form of a single slab. The vertical walls of the structure, as the ends.13, 14, and the a single slab 17, as shown in Fig. 5 of the drawings, or the size of the oven may be increased by the use in each of the vertical walls of a second slab 18, superposed upon the slab 17, as shown in Figs. l, 2 and 3. All

0i the wall members are chambered, as at 19,

and this chamber is most desirably filled with a non-conducting packing, such, for eX- ample, as mineral wool.

In assembling the parts of the casing the lower edges of the side wall sections rest upon the margins of the floor slab 11, the roof or cover slab is laid upon the top edges of the side and end wall members, and the joints thus formed are bound with angle irons, as 20 (Fig. 4). Preferably those angle irons 20 which cover the joints about the floor slab 11, are connected at their ends by brackets 21, which provide legs for the structure adapted to rest on the fioor. An open rectangular frame is thus produced for receiving the fioor slab 11 and the lower edges of the vertical wall members.

The vertical walls 13, 14, 15, 16, and cover 12 are preferably bolted together. As

shown, lhorizontal tie-rods 22, which extend through the structure from end to end preferably within the chambers 19 of the side walls 15, 16, and through the vertical margins of the end walls 13, 14, bind the vertical angle irons 20 at each side of thestructure together for this purpose. Similarly, those angle irons 20 which surround the cover slab 12 are secured in place by means of bolts 23, which extend upwardly through the margins of the cover slab. Preferably the bolts 22 are secured at their lower ends within the chambers 19 of the side walls 15, 16, as by beingatt'ached by rivets 24 yto the inner face of the outer shell of .the side wall members.

The oven illustrated inthe drawings is of that form wherein gases from the rewhich supplies heat for the baking operation are confined within flues and are not permitted to come in Contact with the' material to be baked. As shown, the chamber of the structure is divided into compartments, as 25, 26, 27 and 28, by a plurality of horizontal partitions or shelves 29, 30, 31, arranged at different levels. A fire-box', generally designated 32, :is most conveniently located within the lowest compartment 25, and the partitions 29, 30 and 31, serve the purpose of shelves for receivingv the material to be baked.

The fire-box 32 is preferably of an inclosed form and is supported by a metal base frame33, which rests upon the floor slab 11, the space 34 -inclosed by the frame cui constituting the ash-pit of the lire-box. Grate bars 35 carried by the frame 33, cover the ash-pit 34, and the iresbox proper takes the forni of a` tile-lined 'metal trough 36, mounted on the frame 33 and covered by an arch-shaped tile 37. Most desi'rably the lshelf 29 is heated by radiation-from the lireboir 32 and by Contact with its under of less width than the chamber of the casing l0, thereby providing for the passage of air from the compartment 25 .about the iireboit 82 into the baking compartments 26, 27 and 28, as at 85 (Fig. 4l). For supporting the shelves a plurality of transverse l'lirons l0 are applied to the upper side of each, the ends, as d1, of certain of the l'lirons being extended beyond the margins of the shelves where they rest upon ledges, as d2, d3, formed upon the inside face of the side wall members of the structure. As shown, the ledges Ll2 are constructed from angle plates del. rllhese angle yplates have one leaf secured to the inside face of the outer shell of the lower sections 17 of the vertical wall members, as by means of rivets d5, and have the other leaf projecting horizontally through the inner shell of these side wall sections, as most clearly shown in Fig. 3 of the drawings. lln addition to providing the shelf-supporting ledges d2, these angle plates dd serve the further functions of uniting the inner and outer shells of the vertical wall sections 17 and of supporting the packing material lo with which the chambers 19 of these wall sections are hlled. 'llhe structure may be still further strengthened'by securing one of the tie-rods 22 to the horizontal leaf of each of the angle plates dll, at intervals throughout its length within the chamber 19 of the corresponding wall section, as by means of rivets L t7 liig. el).

rlFhe shelf-supporting ledges 43 most conveniently take the form of flanges formed upon the inner faces of the lower sections i7 of the side wall members 15, lo, adjacent their top edges. rlhese flanges, and a similar flange 85 formed on the back wall 1d (llig. 2) serve for supporting an vinner cover meniber 58, having marginal flanges 60, when the cover slab l2 is applied directly upon the top of the lower wall sections 17, as in llig. 5 of the drawings. lfor supporting a simi lar cover member 87 when the oven is constructed as in Figs. l to t of the drawings, idanges d8 are provided upon the inner faces of the upper sections i8 of each of the side wall members l5, l5, and bach member ll,

libraire adjacent the top edges of these sections. Most desirably each of the baking shelves, as 29, 30 and 3l, is covered with tile di), these tile being conveniently fitted into the spaces between the 'IF-irons d0, as most clearly shown in Fig. 2.

Preferably the chambers 38 and 39 of the shelves 30 and 3l, are divided midway of the length of the shelves by vertical partitions, as 50, which extend from side to side of the chambers. lo permit of these chambers being cleaned from one end of the shelf,

these partitions are preferably pivotally supported in such a way that they may be swung in a horizontal plane, as by being mounted upon a vertical pivot 5l provided at the center of the shelf.

Receiving and discharge due heads, designated 52 and 58, respectively, communicating with the chambers 38, 39, of the shelves 30 and 3l at each side of the partitions 50, are provided at opposite sides of the shelves. As shown, the receiving flue heads 52 are downwardly-directed, and the discharge due heads 53 are upwardly-directed, the recev ing and discharge flue heads at the two sides of the partition 50 of each shelf being at opposite sides of the shelf,l respectively. its shown, ilues 54 and 55, leading out of the chamber of the hre-bon 32 at opposite sides and extending up along the inside walls of the structure through the spaces 85 at the margins of the shelf 29, deliver to the receiving flue-heads 52 of the shelf 30. lin the structure disclosed in Figs. l, 2, 3 and l of the drawings, flue pipes 56 and 57, located adjacent opposite sides of the structure and at either side of the plane of the partitions 50, connect the discharge due heads 53 of the shelf 80 with the receiving Idue-heads 52 of the shelf 31. 4

lThe inner'cover members 58, 87, are preferably chambered, and these'chambers each constitute a receiving flue communicating with a stack 59. ln the arrangement illustrated in lligs. il to d of the drawings embodying the cover member 87, hlue pipes 6l and G2 lead from the discharge flue-heads 53 ofthe shelf 3l to the cover chamber. ln the arrangement illustrated in Fig. 5 of the lll@ drawings, lues pipes 63, 6d, lead directly from the discharge Hue-heads 53 of the shelf 30 to the cover chamber 58. lin both cases furnace gases .are delivered to the due chamber of the cover members from opposite sides and from points adjacent each end of the oven structure. rllhe stach 59 ispreferably connected to the top of the flue chamber over the cover member adjacent its center, and leads upwardly through the cover slab l2.

Access to the several parts of the oven is preferably had through door openings in the front wall i3 of the structure. j To this end doors 85, 86, leading into the chamber crank shaft the swinging leaf 68 of the dooris rigidly secured. Crank-arms 71 are applied to the crank shaft 70 at each side of the door opening. Preferably these crank-arms project radially from the crank shaft away from the swinging leaf 68 carried thereby, and the free ends of the crank shafts 'are connected by links 72 to the vertical sliding leaf 69 of the door.- Preferably the weight of the swinging leaf 68 is sufficient to raise the corresponding sliding lea-f 69 and thereby normally maintain the parts of the door in the closed posit-ion. Both parts of the door may, however, be simultaneously opened by pressure applied to the sliding leaf 69. To this end the upper edge of the sliding leaf is provided with a flange 73, which serves asa rest for the tool, not shown,`employed for introducing or removing articles from the corresponding oven compartment.

Provision is also made for cleaning the flue chambers 38, 39 and 58, through the front wall 13 of thevstructure. To this end each of these flue chambers and the front wall 13 are provided with registering a'- ertures 74:, 75. hese apertures are normal y closed by 'a pus 4'cover 76 applied to the outer end of the aperture of the front wall.

Most desirably the joints between the several members of the wall of the structure are of a formadapted to prevent leakage of air therethrough. The form of joint employed at the corners of the structure is most clearly 'illust-rated in Figs. 2, 3 and 4 of the drawbled, t'he unchamfered portion of the mar-- ginal edge of the side member bears against the flange 78 of the end member, and the ange 80 of the side member bears against the inside'face of the end member. A-wide bearing surface between the connected membersis thus provided, and if this be packed,

as by means of a gasket 81 of asbestos paper, leakage of air is prevented. At those joints where connecting bolts, as 22, 23, are employed, the bolt extends through an aperture 82 in the flange 78. The top edge of the lower sect-ion 17 of each of the side and end wall members 13, 14, 15,16, is chamfered, as at 83 (Figs. 2 and 5), to conform to the shape'of the marginal edges of the coverslab 12, in order that the cover slab may be apder, however, that a tight joint 'may be made between the lower sect-ions 17 of the wall members and the superposed sections 18 illustrated. in Figs. 1, 2 and 3, the bottom edges 84 of the superposed sections are made of a form complementary to the form of the top edge provided for the lower sections 17. It will thus be seen that the cover slab 12 may be applied interchangeably either to the top edge of the lower sections 17 of the wall members, or to the top edge of the sect-ions 18 superposed thereon, and that in the latter arrangement an additional baking compartment 28 is provided in the oven.

Means are preferably provided for preventing overheating of the shelf 29. As shown, this shelf is chambered, as at 90 (Figs. 2, 3 and 5), and the front wall of the chamber is provided with apertures 91 which register with openings 94: in the front wall l 13, controlled by dampers 92. The chamber 90 of the shelf 29 communicates with .a flue -of the furnace, as with the chamber of the shelf 30, through a Hue 93 at the rear of the structure. If now the dampers 92 be opened air will be drawn from outside of the oven structure through the chamber 90 to the flue 93, thuscooling the shelf 29.

I claim as my inventionl. In combination, a chamberedwall for a baking compartment, a partition transverse v to the plane of the wall dividing the charnber from end to end, a furnace flue leading intothe chamber at each side of the partition, the openings of such iues into the chamber being at opposite ends of the wall, respectivelyband a flue leading out of the chamber at each side of the partition, the opening from the chamber into each of said last-named flues being located at that end of the wall remote from the furnace flue opening at the'same side of the partition.

2. In a bake oven, in combination, a baking compartment having a chambered floor and roof, a vertical partition dividing the floor chamber from side to side of the compartment, a furnace flue leading into the floor chamber at each side of the partition, the openings of such liues linto the chamber beingat opposite sides of the compartment, respectively, and a flue leading from the floor chamber at each side of the partition to the roof chamber, each of said last-named tlues being located at that side of the com- '75 plied directly thereto, as in Fig. 5. In or partaient remote from the furnace flue de livering to the tloor chamber at the same side ot the partition.

3. ln a bake oven, in combination, a baking compartmenthaving a chambered door and root, vertical partitions extending from side to side of the compartment dividing the floor and root chambers, respectively, a furnace 'Hue leading into the floor chamber at each side of the' partition therein, the openings of suoli tlues into the chamber' being at opposite sides ot the compartment, respectively, andHues located at opposite sides ot the partitions leading from the floor chamber to the root chamber, each of said lastnamed tlues being located at that side ot the compartment remote from the furnace tiue delivering to the floor chamber at the same side of the partition therein.

fl. ln combination, a chambered floor tor baking compartments having a cleanout opening in an end Wall o'f its chamber, a horizontally-swinging vertical partition normally dividing the floor chamber from side to side, and a iturnace tlue delivering tothe floor chamber at each side of the partition.

5. lin combination, a chambered Hoor for baking compartments having a clean-out opening in an end wall ot its chamber, a horizontally-swinging vertical partition pivotally mounted at the center of the licor chamber and normally dividin the said chamber trom side to side, and a urnace tlue delivering to the floor chamber at each side ot the partition.

6. ln a door Jroi' balie ovens, in combina tion, a rotatable crank-shaft extending along one side of the door opening, a swinging leait carried by the crank-shaft and normally covering a partot' the door opening'adjacent the crank-shaft, a sliding leaf covering a part ot the door opening remote trom the crank-shaft, and a link connecting the lastnamed leazt with a crank ot Jthe shaft.

5. ln a door for bake ovens, in combination, a horizontal shaft extending along the top edge of the door opening, an inwardlyswinging leaf normally covering the higher portion ot the door opening carried by the crank-shan, a vertically-sliding leaf mounted in front of the swinging leaf and normally covering the lower portion ot the door opening, crank-arms mounted on the ends of the crankshaft extending away from the swinging leaf, and links located at the sides of the door opening connecting the vertically-sliding leaf with the crank-arms.

8. A bake oven comprising, in combination, a chambered casing having a removable double cover and side walls composed of upper and lower sections, shelves. arranged horizontally within the chamber of the casing and dividing the same into compartments, and a plurality of shelf-supporting ledges formedy on the inside walls of the casing, one of such ledges being located adjacent the upper margin of the lower section of the side walls and being adapted to interchangeably receive one of the shelves and the inside member of the cover, the top edge of the lower section of the side walls being adapted to receive either the lower edge of a superposed side wall section or the margins of the outer cover member.

9. A bake oven comprising, in combination, a chambered casing having a removable cover and side Walls composed ol' upper and lower sections, the top edge' of the lower one of the side wall sections being adapted to receive either the lower edge of the superposed side wall sect-ion or the margins ot the cover.

10. A bake oven comprising, in combina` tion, a rectangular chambered structure having wall slabs joined at the corners of the structure, one of the wall slabs having a mitered edge and a flange projecting beyond the miter, the edge of an adjacent wall slab being engaged with the said iange and being chamfered to engage the mitered edge of the iirst slab, an inwardly-directed flange formed on the second-named slab at the base of its chamt'ered edge to bear against the inside face of the first slab and a clamping bolt projecting from the edge of the secondnained slab and through the tlange of the first-named slab.

JUHN FAULDS. Witnesses:

lULrA M. BRISTOL, @iraniens B. GILLSON. 

